“It was nice to finally get my first win since my jaw fracture at the World Championships,” Guarnier told Cyclingnews. “I had a great team around me, and I was happy to be able to deliver on their hard work.”

Guarnier secured the overall victory at the Amgen Women’s Race in 2016, and last year won the opening stage in South Lake Tahoe. That was one of few highlights of 2017 after her season started with a concussion in February and ended with a broken jaw in September at the World Championships.

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She has slowly come into top form through the Classics season with 10th place at the Tour of Flanders, third place at Flèche Wallonne and eighth at Liège-Bastogne-Liège.

At the Tour de Yorkshire, Guarnier won the second stage on a summit finish to Ilkley, and, in doing so, won the overall classification. The win shows that she is back at the top of her game and that she will be a solid contender in California.

Guarnier will not be racing with Boels Dolmans as the team announced in April that they did not have the riders or the resources to compete in both the Amgen Women’s Race and Emakumeen Bira – two conflicting events on the Women’s WorldTour. Therefore, the race will start without Boels Dolmans’ defending champion and Women’s WorldTour leader Anna van der Breggen.